Knee news, part I: Rookie WR Keenan Allen (knee) left practice after individual drills and didn't return. Mike McCoy said the knee treatment relates to the posterior cruciate ligament injury that ended Allen's 2012 season at Cal. The team wants to stay on top of it, McCoy said. On Monday, after Malcom Floyd (knee) went down, Allen saw extra work.

Knee news, part II: Floyd confirmed that he feared he'd torn his right ACL, six days after fellow WR Danario Alexander in fact tore his right ACL. "It was scary but MRIs don't lie," Floyd said. Floyd said he expects to play this season, but didn't say when.

Gates healthy: With three receivers out with knee injuries, Antonio Gates looked spry in catching three TD passes over a span of four plays.

Quick learner?: Ex-tackle Jeromey Clary, who is learning to play right guard, drew praise from coaches for adjusting to a blitz.

Manti Te'o: The rookie linebacker (foot sprain) has watched all three practices in a walking boot since injuring his right foot against the Seahawks .

Medical report: Larry English and Andrew Gachkar returned to practice. Danny Woodhead practiced for the second day in a row after being sidelined for nine days. McCoy rested several older players.